<html>
<head>
    <meta charset="UTF-8">
    <title>比特跳动</title>
</head>
<body>
<center>
    <h1>百度</h1>
    <input type="text" value="默认内容">
    <input type="button" value="百度一下">
    <br>
    <a href="/reg.html">注册</a>
    <br>
    <a href="/classtable.html">课程表</a>
    <table border="1">
        <tr>
            <td>1列</td>
            <td><a href="http://www.taobao.com">淘宝</a></td>
            <td align="center" colspan="2">3列</td>
        </tr>
        <tr>
            <td>1列</td>
            <td rowspan="2">2列</td>
            <td>3列</td>
            <td>4列</td>
        </tr>
        <tr>
            <td>1列</td>
            <td>3列</td>
            <td>4列</td>
        </tr>
        <tr>
            <td>1列</td>
            <td>2列</td>
            <td>3列</td>
            <td>4列</td>
        </tr>
    </table>
</center>
</body>
</html>